A semi-automatic compatible detection optocoupler circuit

Abstract

A semi-automatic compatible optocoupler detection circuit effectively solves the problems that the existing optocoupler detection equipment can only determine whether the optocoupler is damaged, but cannot detect whether the output end or the input end of the optocoupler is damaged, and the detection is not accurate enough. It includes an external power supply module, which includes a USB power supply port and a DC / DC converter; a conversion module, which includes a dip switch; the external power supply module is connected to the conversion module, and the USB power supply port and the DC / DC converter are respectively connected to the dip switch; the utility model is easy to use, and through the settings of a light-emitting diode, a first button, a second button, etc., maintenance personnel can determine the state of the control optocoupler by short-circuiting an active probe. Even if the control optocoupler is damaged, the corresponding active probe is short-circuited and the display status of a two-color diode or a light-emitting diode is observed, so as to quickly determine whether the output end or the input end of the control optocoupler is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution network, in particular to a semi-automatic compatible detection optocoupler circuit. Background Art

[0002] Optocouplers are used as an important function in the input circuit, output circuit, communication circuit, analog circuit and other circuits of secondary protection devices in the field of power distribution. Therefore, it is particularly important to judge whether the optocoupler works normally.

[0003] Once an abnormality occurs in the circuit of the protection device, maintenance personnel need to determine whether dozens of components in the entire circuit are normal when checking the circuit problem. Due to the particularity of the optocoupler in the circuit, it is often impossible to determine with a simple multimeter.

[0004] In Chinese patent application No. 201920982330.3, there is disclosed an optocoupler detection device, including an input voltage regulating circuit, an output circuit and an optocoupler, wherein the input voltage regulating circuit is connected to the input end of the optocoupler, and the output circuit is connected to the output end of the optocoupler; the input voltage regulating circuit includes a first power supply, an adjustable potentiometer and a current limiting resistor, the positive electrode of the first power supply is connected to the positive electrode of the optocoupler input end through the adjustable potentiometer, and the negative electrode of the first power supply is connected to the negative electrode of the optocoupler input end through the current limiting resistor; the current in the input voltage regulating circuit is adjusted by the adjustable potentiometer to change the luminous intensity of the light-emitting diode in the optocoupler, thereby adjusting the voltage at the output end of the optocoupler, and judging whether the optocoupler is qualified according to the voltage at the output end of the optocoupler. The problem existing in the prior art of using a multimeter for detection is solved, and the detection accuracy of the optocoupler element using the optocoupler detection device of the utility model reaches 100%, and at the same time, the detection efficiency is greatly improved, saving manpower and time costs of detection.

[0005] However, the existing optocoupler detection device still has the following problems:

[0006] 1. It can only determine whether the optocoupler is damaged, but cannot detect whether the output or input end of the optocoupler is damaged, and the detection is not accurate enough.

[0007] 2. When testing the optocoupler, damage to the optocoupler testing equipment may also cause inaccurate test results. Existing optocoupler testing equipment cannot self-test, which limits the accuracy of the optocoupler testing equipment. Utility Model Content

[0008] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a semi-automatic compatible detection optocoupler circuit, which effectively solves the problems mentioned in the background technology.

[0009] The technical solution is as follows: the utility model comprises:

[0010] An external power supply module, the external power supply module comprising a USB power supply port and a DC / DC converter;

[0011] A conversion module, wherein the conversion module comprises a dip switch;

[0012] The external power supply module is connected to the conversion module, and the USB power supply port and the DC / DC converter are respectively connected to the dip switch;

[0013] An internal power supply module, the internal power supply module comprising a battery pack, the battery pack being divided into a high-voltage battery pack and a low-voltage battery pack;

[0014] A detection module, the detection module comprising a control optical coupler, an input port of the control optical coupler is connected in series with a light emitting diode, the light emitting diode is connected in series with a first button, the first button is connected in series with a low-voltage battery pack, and another input port of the control optical coupler is connected with a two-color diode;

[0015] The output port of the control optocoupler is connected in series with a second button, the second button is connected to a high-voltage battery pack, another output port of the control optocoupler is connected to an active probe, two active probes are connected to the two-color diode, an active probe is connected in parallel between the low-voltage battery pack and the first button, and the four active probes are respectively connected to the probe ports of the optocoupler to be tested.

[0016] Preferably, the USB power supply port and the DC / DC converter are respectively connected with transient suppression diodes for quickly discharging peak pulse energy and protecting subsequent circuits.

[0017] Preferably, a steering diode is provided between the high voltage battery pack and the second button, and the steering diode is connected to the second button via a current limiting resistor.

[0018] Preferably, a steering diode is respectively arranged between the USB power supply port, the DC / DC converter and the second button, and a current-limiting resistor is also arranged between the DC / DC converter and the second button.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. Through the settings of two-color diode, detection module and internal power supply module, the four active probes in the detection module are inserted into the four pins of the optocoupler to be tested. Through the light display of the two-color diode, the state of the optocoupler to be tested can be quickly determined, which reduces the inspection time of maintenance personnel and reduces costs.

[0021] 2. Through the settings of light-emitting diodes, the first button and the second button, maintenance personnel can determine the status of the control optocoupler by short-circuiting the active probes. Even if the control optocoupler is damaged, by short-circuiting the corresponding active probes and observing the display status of the two-color diode or the light-emitting diode, it can be quickly determined whether the output or input end of the control optocoupler is damaged.

[0022] 3. Through the setting of the two-color diode and four active probes, when the four active probes are respectively inserted into the input ports of the optocoupler to be tested, the fault condition can be quickly determined by observing whether the lights of the corresponding connection ports of the two-color diode are on, thereby improving the accuracy of the detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a circuit diagram of the utility model.

[0024] Figure 2 It is a schematic diagram of the process of the utility model.

[0025] Explanation of the symbols in the schematic diagram:

[0026] 10. External power supply module; 11. USB power supply port; 12. DC / DC converter; 20. Conversion module; 21. DIP switch; 30. Internal power supply module; 31. High voltage battery pack; 32. Low voltage battery pack; 40. Detection module; 41. Control optocoupler; 42. Light emitting diode; 43. First button; 44. Two-color diode; 45. Second button; 50. Transient suppression diode; 60. Optocoupler to be tested. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Depend on Figure 1 to Figure 2 Given, including:

[0029] An external power supply module 10, the external power supply module 10 includes a USB power supply port 11 and a DC / DC converter 12, the USB power supply port 11 includes a conventional 5V power port, and the DC / DC converter 12 can use a 24V to 5V specification or a 48V to 5V / 24V specification;

[0030] A conversion module 20, wherein the conversion module 20 includes a dip switch 21, and a power supply mode of the external power supply module is selected by the dip switch 21;

[0031] The external power supply module 10 is connected to the conversion module 20, and the USB power supply port 11 and the DC / DC converter 12 are respectively connected to the dip switch 21;

[0032] An internal power supply module 30, wherein the internal power supply module 30 includes a battery pack. When the maintenance personnel cannot use the detection equipment by external power supply, the battery can be directly installed on the detection equipment to improve the versatility of the detection equipment. The battery pack is divided into a high-voltage battery pack 31 and a low-voltage battery pack 32. The high-voltage battery pack 31 uses 4 large-capacity 1.5V batteries, and the low-voltage battery pack 32 uses 2 1.5V batteries;

[0033] The detection module 40 includes a control optical coupler 41, and an input port of the control optical coupler 41 is connected in series with a light-emitting diode 42, and the light-emitting diode 42 is connected in series with a first button 43, and the first button 43 is connected in series with the low-voltage battery pack 32. A current-limiting resistor is also arranged between the first button 43 and the low-voltage battery pack 32. When the detection device is self-checked, the first button 43 is pressed, and when there is no fault at the input end of the control optical coupler 41, the light-emitting diode 42 lights up, and when there is a fault, it does not light up, thereby achieving the purpose of rapid self-checking the input end of the control optical coupler 41. Another input port of the control optical coupler 41 is connected to a two-color diode 44;

[0034] The output port of the control optocoupler 41 is connected in series with a second button 45, and the second button 45 is connected to the high-voltage battery pack 31. Another output port of the control optocoupler 41 is connected to an active probe. Two active probes are connected to the two-color diode 44. An active probe is connected in parallel between the low-voltage battery pack 32 and the first button 43. The four active probes are respectively connected to the probe ports of the optocoupler to be tested. When testing the optocoupler 60 to be tested, it is only necessary to insert the four active probes into the corresponding probe ports respectively.

[0035] refer to Figure 1 As shown, the USB power supply port 11 and the DC / DC converter 12 are respectively connected with a transient suppression diode 50 for quickly discharging peak pulse energy and protecting the subsequent circuit.

[0036] refer to Figure 1 As shown, a steering diode is provided between the high voltage battery pack 31 and the second button 45 , and the steering diode is connected to the second button 45 via a current limiting resistor, and the steering diode is used to protect subsequent circuits.

[0037] refer to Figure 1As shown, a steering diode is respectively arranged between the USB power supply port 11 , the DC / DC converter 12 and the second button 45 , and a current limiting resistor is also arranged between the DC / DC converter 12 and the second button 45 .

[0038] When the optical coupler to be tested is in place, the first button 43 is manually pressed, and the voltage level of the low-voltage battery pack 32 passes through the current limiting resistor and the two input ports of the control optical coupler 41 in turn, and then drives the light-emitting diode 42 to light up;

[0039] After the control optocoupler 41 is turned on, the second button 45 is manually pressed, and the external power supply module 10 or the high-voltage battery pack 31 drives the input port of the optocoupler to be tested after passing through the corresponding current limiting resistor, and the two-color diode 44 connected to the optocoupler 60 to be tested drives the light. In this way, it is possible to quickly determine whether the optocoupler 60 to be tested is damaged. At the same time, when the two-color diode 44 connected to the input port of the optocoupler 60 to be tested is not lit, the input port of the optocoupler 60 to be tested is damaged. Similarly, when the two-color diode 44 connected to the output port is not lit, the output port of the optocoupler 60 to be tested is damaged.

[0040] Determine whether the testing equipment itself is damaged:

[0041] To determine whether the input end of the control optical coupler 41 is damaged, it is only necessary to manually press the first button 43 to turn on the circuit and then observe whether the light emitting diode 42 lights up. If it does not light up, the input end of the control optical coupler 41 is damaged.

[0042] Determine whether the output end of the control optical coupler 41 is damaged, manually short-circuit the output end and the corresponding active probe of the two-color diode 44, and after manually pressing the second button 45, the two-color diode 44 lights up, indicating that the output end is normal;

[0043] To determine whether the two-color diode 44 is damaged, manually short-circuit the other two active probes, and the low-voltage battery pack 32 drives the two-color diode 44 to light up. If it does not light up, it means that the two-color diode 44 is damaged.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic compatible detection optocoupler circuit, characterized in that: include: An external power supply module (10), the external power supply module (10) comprising a USB power supply port (11) and a DC / DC converter (12); A conversion module (20), wherein the conversion module (20) comprises a dip switch (21); The external power supply module (10) is connected to the conversion module (20), and the USB power supply port (11) and the DC / DC converter (12) are respectively connected to the DIP switch (21); An internal power supply module (30), the internal power supply module (30) comprising a battery pack, the battery pack being divided into a high-voltage battery pack (31) and a low-voltage battery pack (32); A detection module (40), the detection module (40) comprising a control optical coupler (41), an input port of the control optical coupler (41) being connected in series with a light emitting diode (42), the light emitting diode (42) being connected in series with a first button (43), the first button (43) being connected in series with a low-voltage battery pack (32), and another input port of the control optical coupler (41) being connected with a two-color diode (44); The output port of the control optical coupler (41) is connected in series with a second button (45), the second button (45) is connected to the high-voltage battery pack (31), another output port of the control optical coupler (41) is connected to an active probe, the two-color diode (44) is connected to two active probes, an active probe is connected in parallel between the low-voltage battery pack (32) and the first button (43), and the four active probes are respectively connected to the probe ports of the optical coupler to be tested.

2. A semi-automatic compatible detection optocoupler circuit according to claim 1, characterized in that: The USB power supply port (11) and the DC / DC converter (12) are respectively connected to a transient suppression diode (50) for quickly discharging peak pulse energy and protecting subsequent circuits.

3. A semi-automatic compatible detection optocoupler circuit according to claim 2, characterized in that: A steering diode is provided between the high-voltage battery pack (31) and the second button (45), and the steering diode is connected to the second button (45) via a current-limiting resistor.

4. The semi-automatic compatible detection optocoupler circuit according to claim 3, characterized in that: Steering diodes are respectively arranged between the USB power supply port (11), the DC / DC converter (12) and the second button (45), and a current-limiting resistor is also arranged between the DC / DC converter (12) and the second button (45).

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